Hi Tony,
There's a
little motor/gearbox to move the head, and I think a position
detelction swtich. I will check the manual for you. The technical manual
I have gives schematics for the cassette option, exploded views,
dismantling instructions, etc.
HEre's a little information on how this works.
... lots of useful info ...
Thanks! - that was very helpful.
When you said "quite a fiddle" you weren't kidding ... but on the + side,
it gets easier after about the third time...
Problem turned out to be mechanical, a combination of dirt/aging lubricants
in the mechanics which slide the head/capstan in and out, and dirty contacts
in the position detector leaf switch. After cleaning and lubricating the
mechanical parts, and cleaning and adjusting the switch (which is quite
finicy - hence the "several times" - it's more fun to take apart with a
tape
stuck in it) ... the drive is working fine now, and the HX-20 is saving and
loading programs like it was new!
Thanks again & regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools:
www.dunfield.com
com Collector of vintage computing equipment:
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